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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        let arr = {
            uname: 'pink老师',
            age: '18',
            tender: '男'
        }
        for (let k in arr) {
            //k是属性的字符串形式
            //arr对象的名字
            console.log(k + '---->' + arr[k]);
        }
    </script>
</body>

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